Image Processing System, Processing Method, and Storage Medium

1. An image processing system comprising: an obtaining unit configured to obtain a plurality of tomographic images of an eye to be examined; an extraction unit configured to extract a retinal layer from the plurality of tomographic images; a generation unit configured to generate three-dimensional shape data of the retinal layer based on the retinal layer extracted by the extraction unit; a setting unit configured to set a flat surface that is movable in a depth direction of the retinal layer extracted by the extraction unit at a reference position of the three-dimensional shape data of the retinal layer; a measurement unit configured to measure at least one of an area and a volume of the retinal layer, based on the three-dimensional shape data of the retinal layer and the flat surface at the reference position, wherein the area is an area of the flat surface surrounded by the three-dimensional shape data of the retinal layer, and the volume is a volume of a region surrounded by the three-dimensional shape data of the retinal layer and the flat surface; and a display control unit configured to display at least one of the area and the volume on a display device.

2. The system according to claim 1 , further comprising a selection unit configured to select a predetermined layer from retinal layers, wherein the generation unit generates the three-dimensional shape data of the selected layer.

3. The system according to claim 1 , further comprising an imaging mode selection unit configured to select an imaging mode from a plurality of imaging modes used to capture an image of an eye to be examined, wherein at least one of a position of a vision fixation lamp, a scanning range of irradiating light, a scanning pattern of the irradiating light, and an imaging position along an optical axis direction of the irradiating light is changed according to the imaging mode selected by the imaging mode selection unit.

4. The system according to claim 1 , wherein the display control unit displays an index indicating a positional relationship between the three-dimensional shape data of the retinal layer and the flat surface on the display device.

5. The system according to claim 4 , wherein the index is configured to include an object indicating the three-dimensional shape data of the retinal layer and a schematic flat surface indicating the flat surface.

6. The system according to claim 5 , wherein the display control unit displays the three-dimensional shape data of the retinal layer, the index, and at least one of the area and the volume on the display device.

7. The system according to claim 6 , wherein when an operator changes the positional relationship between the object and the schematic flat surface displayed on the display device via an input device, the measurement unit applies the three-dimensional shape analysis to a region changed accordingly, and the display control unit changes and displays the result of the three-dimensional shape analysis in synchronism with the change of the positional relationship between the object and the schematic flat surface.

8. The system according to claim 1 , wherein the display control unit displays a two-dimensional tomographic image, which refers to retinal layers from a predetermined viewpoint position, and three-dimensional shape data of the retinal layer side by side on the display device, and when an operator changes the viewpoint position via an input device, the display control unit changes and displays the viewpoint position of the two-dimensional tomographic image and the three-dimensional shape data of the retinal layer in synchronism with that change.

9. A processing method of an image processing system, comprising: obtaining a plurality of tomographic images of an eye to be examined; extracting a retinal layer from the plurality of tomographic images; generating three-dimensional shape data of the retinal layer based on the extracted retinal layer; setting a flat surface that is movable in a depth direction of the extracted retinal layer at a reference position of the three-dimensional shape data of the retinal layer; measuring at least one of an area and a volume of the retinal layer, based on the three-dimensional shape data of the retinal layer and the flat surface at the reference position, wherein the area is an area of the flat surface surrounded by the three-dimensional shape data of the retinal layer, and the volume is a volume of a region surrounded by the three-dimensional shape data of the retinal layer and the flat surface; and displaying at least one of the area and the volume on a display device.

10. A non-transitory computer readable storage medium storing a program for controlling a computer to execute the processing method of claim 9 .

11. An image processing system comprising: an obtaining unit configured to obtain a plurality of tomographic images of an eye to be examined; an extraction unit configured to extract a retinal layer from the plurality of tomographic images; a generation unit configured to generate three-dimensional shape data of the retinal layer based on the retinal layer extracted by the extraction unit; a setting unit configured to set a flat surface that is movable in a depth direction of the retinal layer extracted by the extraction unit at a reference position of the three-dimensional shape data of the retinal layer; a measurement unit configured to measure an intersection region between the three-dimensional shape data of the retinal layer and the flat surface at the reference position; and a display control unit configured to display the measured intersection region on a display device, wherein the measurement unit is configured to measure an area of the intersection region surrounded by the three-dimensional shape data of the retinal layer and a volume of a region surrounded by the intersection region and the three-dimensional shape data of the retinal layer, and the display control unit is configured to display a graph indicating at least one of the area and the volume.

12. The system according to claim 11 , wherein the measurement unit measures a plurality of intersection regions between the three-dimensional shape data of the retinal layer and the flat surface, in a case where the flat surface is moved at constant intervals in the depth direction.

13. The system according to claim 12 , wherein the display control unit displays a tomographic image on which a line indicating a position of the flat surface is superimposed.

14. The system according to claim 1 , wherein the measurement unit measures an area and a volume with respect to each flat surface corresponding to each of a plurality of different positions located in a depth direction of the three-dimensional shape data of the retinal layer, and obtains a plurality of areas and volumes corresponding to respective flat surfaces, and the display control unit displays the obtained plurality of areas and volumes on the display device.

15. The system according to claim 1 , wherein the area and the volume are values used for obtaining a curvature of the retinal layer.